“鞋子合不合脚，自己穿了才知道。”一个国家的发展道路合不合适，只有这个国家的人民才有发言权。***主席这一观点的哲学依据是（    ）

①矛盾的普遍性与特殊性是具体的历史的统一

②实践是检验认识真理性的唯一标准

③人们群众是历史的创造者

④真理是客观的、具体的、无条件的

臣欲奉诏奔驰，____；____，____;臣之进退，实为狼狈。

如图，在⊙O中，$\stackrel{\wedge }{AC}$=$\stackrel{\wedge }{BD}$，若∠AOB=40°，则∠COD=____ °

阅读理解
   There is an old English saying.It tells us that we must go to bed early and get up early in the morning.Then we shall be healthy.We shall also be rich and clever.This is true.The body must have enough sleep to be healthy.Children of young age should have ten hours' sleep every night.Children who do not have enough sleep cannot do their work well and they may not be healthy.The body also needs exercise.Walking, running, jumping and playing games are all exercise.Exercise keeps the body strong.Exercise also helps the blood to move around inside the body.It is very important.Our blood moves to all parts of our body.The head also needs blood.Exercise helps us to think better.